446 lines
16 KiB
C
446 lines
16 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2019 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "fsl_flexio_i2s_edma.h"
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.flexio_i2s_edma"
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#endif
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/*******************************************************************************
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* Definitations
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******************************************************************************/
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/* Used for 32byte aligned */
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#define STCD_ADDR(address) (edma_tcd_t *)(((uint32_t)(address) + 32U) & ~0x1FU)
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/*<! Structure definition for flexio_i2s_edma_private_handle_t. The structure is private. */
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typedef struct _flexio_i2s_edma_private_handle
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{
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FLEXIO_I2S_Type *base;
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flexio_i2s_edma_handle_t *handle;
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} flexio_i2s_edma_private_handle_t;
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/*!@brief _flexio_i2s_edma_transfer_state */
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enum
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{
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kFLEXIO_I2S_Busy = 0x0U, /*!< FLEXIO I2S is busy */
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kFLEXIO_I2S_Idle, /*!< Transfer is done. */
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};
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/*<! Private handle only used for internally. */
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static flexio_i2s_edma_private_handle_t s_edmaPrivateHandle[2];
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief FLEXIO I2S EDMA callback for send.
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*
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* @param handle pointer to flexio_i2s_edma_handle_t structure which stores the transfer state.
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* @param userData Parameter for user callback.
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* @param done If the DMA transfer finished.
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* @param tcds The TCD index.
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*/
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static void FLEXIO_I2S_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds);
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/*!
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* @brief FLEXIO I2S EDMA callback for receive.
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*
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* @param handle pointer to flexio_i2s_edma_handle_t structure which stores the transfer state.
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* @param userData Parameter for user callback.
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* @param done If the DMA transfer finished.
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* @param tcds The TCD index.
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*/
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static void FLEXIO_I2S_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds);
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/*******************************************************************************
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* Code
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******************************************************************************/
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static void FLEXIO_I2S_TxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds)
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{
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flexio_i2s_edma_private_handle_t *privHandle = (flexio_i2s_edma_private_handle_t *)userData;
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flexio_i2s_edma_handle_t *flexio_i2sHandle = privHandle->handle;
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/* If finished a block, call the callback function */
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(void)memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t));
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flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE;
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if (flexio_i2sHandle->callback != NULL)
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{
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(flexio_i2sHandle->callback)(privHandle->base, flexio_i2sHandle, kStatus_Success, flexio_i2sHandle->userData);
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}
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/* If all data finished, just stop the transfer */
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if (flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver].data == NULL)
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{
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FLEXIO_I2S_TransferAbortSendEDMA(privHandle->base, flexio_i2sHandle);
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}
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}
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static void FLEXIO_I2S_RxEDMACallback(edma_handle_t *handle, void *userData, bool done, uint32_t tcds)
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{
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flexio_i2s_edma_private_handle_t *privHandle = (flexio_i2s_edma_private_handle_t *)userData;
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flexio_i2s_edma_handle_t *flexio_i2sHandle = privHandle->handle;
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/* If finished a block, call the callback function */
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(void)memset(&flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver], 0, sizeof(flexio_i2s_transfer_t));
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flexio_i2sHandle->queueDriver = (flexio_i2sHandle->queueDriver + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE;
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if (flexio_i2sHandle->callback != NULL)
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{
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(flexio_i2sHandle->callback)(privHandle->base, flexio_i2sHandle, kStatus_Success, flexio_i2sHandle->userData);
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}
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/* If all data finished, just stop the transfer */
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if (flexio_i2sHandle->queue[flexio_i2sHandle->queueDriver].data == NULL)
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{
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FLEXIO_I2S_TransferAbortReceiveEDMA(privHandle->base, flexio_i2sHandle);
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}
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}
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/*!
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* brief Initializes the FlexIO I2S eDMA handle.
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*
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* This function initializes the FlexIO I2S master DMA handle which can be used for other FlexIO I2S master
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* transactional APIs.
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* Usually, for a specified FlexIO I2S instance, call this API once to get the initialized handle.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S eDMA handle pointer.
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* param callback FlexIO I2S eDMA callback function called while finished a block.
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* param userData User parameter for callback.
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* param dmaHandle eDMA handle for FlexIO I2S. This handle is a static value allocated by users.
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*/
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void FLEXIO_I2S_TransferTxCreateHandleEDMA(FLEXIO_I2S_Type *base,
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flexio_i2s_edma_handle_t *handle,
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flexio_i2s_edma_callback_t callback,
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void *userData,
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edma_handle_t *dmaHandle)
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{
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assert((handle != NULL) && (dmaHandle != NULL));
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/* Zero the handle. */
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(void)memset(handle, 0, sizeof(*handle));
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/* Set flexio_i2s base to handle */
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handle->dmaHandle = dmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Set FLEXIO I2S state to idle */
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handle->state = (uint32_t)kFLEXIO_I2S_Idle;
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s_edmaPrivateHandle[0].base = base;
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s_edmaPrivateHandle[0].handle = handle;
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/* Need to use scatter gather */
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EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), FLEXIO_I2S_XFER_QUEUE_SIZE);
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/* Install callback for Tx dma channel */
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EDMA_SetCallback(dmaHandle, FLEXIO_I2S_TxEDMACallback, &s_edmaPrivateHandle[0]);
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}
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/*!
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* brief Initializes the FlexIO I2S Rx eDMA handle.
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*
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* This function initializes the FlexIO I2S slave DMA handle which can be used for other FlexIO I2S master transactional
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* APIs.
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* Usually, for a specified FlexIO I2S instance, call this API once to get the initialized handle.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S eDMA handle pointer.
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* param callback FlexIO I2S eDMA callback function called while finished a block.
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* param userData User parameter for callback.
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* param dmaHandle eDMA handle for FlexIO I2S. This handle is a static value allocated by users.
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*/
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void FLEXIO_I2S_TransferRxCreateHandleEDMA(FLEXIO_I2S_Type *base,
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flexio_i2s_edma_handle_t *handle,
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flexio_i2s_edma_callback_t callback,
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void *userData,
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edma_handle_t *dmaHandle)
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{
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assert((handle != NULL) && (dmaHandle != NULL));
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/* Zero the handle. */
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(void)memset(handle, 0, sizeof(*handle));
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/* Set flexio_i2s base to handle */
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handle->dmaHandle = dmaHandle;
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handle->callback = callback;
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handle->userData = userData;
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/* Set FLEXIO I2S state to idle */
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handle->state = (uint32_t)kFLEXIO_I2S_Idle;
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s_edmaPrivateHandle[1].base = base;
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s_edmaPrivateHandle[1].handle = handle;
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/* Need to use scatter gather */
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EDMA_InstallTCDMemory(dmaHandle, STCD_ADDR(handle->tcd), FLEXIO_I2S_XFER_QUEUE_SIZE);
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/* Install callback for Tx dma channel */
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EDMA_SetCallback(dmaHandle, FLEXIO_I2S_RxEDMACallback, &s_edmaPrivateHandle[1]);
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}
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/*!
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* brief Configures the FlexIO I2S Tx audio format.
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*
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* Audio format can be changed in run-time of FlexIO I2S. This function configures the sample rate and audio data
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* format to be transferred. This function also sets the eDMA parameter according to format.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S eDMA handle pointer
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* param format Pointer to FlexIO I2S audio data format structure.
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* param srcClock_Hz FlexIO I2S clock source frequency in Hz, it should be 0 while in slave mode.
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*/
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void FLEXIO_I2S_TransferSetFormatEDMA(FLEXIO_I2S_Type *base,
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flexio_i2s_edma_handle_t *handle,
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flexio_i2s_format_t *format,
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uint32_t srcClock_Hz)
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{
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assert((handle != NULL) && (format != NULL));
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/* Configure the audio format to FLEXIO I2S registers */
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if (srcClock_Hz != 0UL)
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{
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/* It is master */
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FLEXIO_I2S_MasterSetFormat(base, format, srcClock_Hz);
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}
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else
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{
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FLEXIO_I2S_SlaveSetFormat(base, format);
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}
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/* Get the transfer size from format, this should be used in EDMA configuration */
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handle->bytesPerFrame = format->bitWidth / 8U;
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}
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/*!
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* brief Performs a non-blocking FlexIO I2S transfer using DMA.
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*
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* note This interface returned immediately after transfer initiates. Users should call
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* FLEXIO_I2S_GetTransferStatus to poll the transfer status and check whether the FlexIO I2S transfer is finished.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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* param xfer Pointer to DMA transfer structure.
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* retval kStatus_Success Start a FlexIO I2S eDMA send successfully.
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* retval kStatus_InvalidArgument The input arguments is invalid.
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* retval kStatus_TxBusy FlexIO I2S is busy sending data.
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*/
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status_t FLEXIO_I2S_TransferSendEDMA(FLEXIO_I2S_Type *base,
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flexio_i2s_edma_handle_t *handle,
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flexio_i2s_transfer_t *xfer)
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{
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assert((handle != NULL) && (xfer != NULL));
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edma_transfer_config_t config = {0};
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uint32_t destAddr = FLEXIO_I2S_TxGetDataRegisterAddress(base) + (4UL - handle->bytesPerFrame);
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/* Check if input parameter invalid */
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if ((xfer->data == NULL) || (xfer->dataSize == 0U))
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{
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return kStatus_InvalidArgument;
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}
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if (handle->queue[handle->queueUser].data != NULL)
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{
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return kStatus_FLEXIO_I2S_QueueFull;
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}
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/* Change the state of handle */
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handle->state = (uint32_t)kFLEXIO_I2S_Busy;
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/* Update the queue state */
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handle->queue[handle->queueUser].data = xfer->data;
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handle->queue[handle->queueUser].dataSize = xfer->dataSize;
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handle->transferSize[handle->queueUser] = xfer->dataSize;
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handle->queueUser = (handle->queueUser + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE;
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/* Prepare edma configure */
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EDMA_PrepareTransfer(&config, xfer->data, handle->bytesPerFrame, (uint32_t *)destAddr, handle->bytesPerFrame,
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handle->bytesPerFrame, xfer->dataSize, kEDMA_MemoryToPeripheral);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO I2S handle */
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handle->nbytes = handle->bytesPerFrame;
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(void)EDMA_SubmitTransfer(handle->dmaHandle, &config);
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/* Start DMA transfer */
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EDMA_StartTransfer(handle->dmaHandle);
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/* Enable DMA enable bit */
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FLEXIO_I2S_TxEnableDMA(base, true);
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/* Enable FLEXIO I2S Tx clock */
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FLEXIO_I2S_Enable(base, true);
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return kStatus_Success;
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}
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/*!
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* brief Performs a non-blocking FlexIO I2S receive using eDMA.
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*
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* note This interface returned immediately after transfer initiates. Users should call
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* FLEXIO_I2S_GetReceiveRemainingBytes to poll the transfer status and check whether the FlexIO I2S transfer is
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* finished.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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* param xfer Pointer to DMA transfer structure.
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* retval kStatus_Success Start a FlexIO I2S eDMA receive successfully.
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* retval kStatus_InvalidArgument The input arguments is invalid.
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* retval kStatus_RxBusy FlexIO I2S is busy receiving data.
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*/
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status_t FLEXIO_I2S_TransferReceiveEDMA(FLEXIO_I2S_Type *base,
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flexio_i2s_edma_handle_t *handle,
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flexio_i2s_transfer_t *xfer)
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{
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assert((handle != NULL) && (xfer != NULL));
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edma_transfer_config_t config = {0};
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uint32_t srcAddr = FLEXIO_I2S_RxGetDataRegisterAddress(base);
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/* Check if input parameter invalid */
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if ((xfer->data == NULL) || (xfer->dataSize == 0U))
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{
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return kStatus_InvalidArgument;
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}
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if (handle->queue[handle->queueUser].data != NULL)
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{
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return kStatus_FLEXIO_I2S_QueueFull;
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}
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/* Change the state of handle */
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handle->state = (uint32_t)kFLEXIO_I2S_Busy;
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/* Update queue state */
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handle->queue[handle->queueUser].data = xfer->data;
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handle->queue[handle->queueUser].dataSize = xfer->dataSize;
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handle->transferSize[handle->queueUser] = xfer->dataSize;
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handle->queueUser = (handle->queueUser + 1U) % FLEXIO_I2S_XFER_QUEUE_SIZE;
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/* Prepare edma configure */
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EDMA_PrepareTransfer(&config, (uint32_t *)srcAddr, handle->bytesPerFrame, xfer->data, handle->bytesPerFrame,
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handle->bytesPerFrame, xfer->dataSize, kEDMA_PeripheralToMemory);
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/* Store the initially configured eDMA minor byte transfer count into the FLEXIO I2S handle */
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handle->nbytes = handle->bytesPerFrame;
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(void)EDMA_SubmitTransfer(handle->dmaHandle, &config);
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/* Start DMA transfer */
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EDMA_StartTransfer(handle->dmaHandle);
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/* Enable DMA enable bit */
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FLEXIO_I2S_RxEnableDMA(base, true);
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/* Enable FLEXIO I2S Rx clock */
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FLEXIO_I2S_Enable(base, true);
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return kStatus_Success;
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}
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/*!
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* brief Aborts a FlexIO I2S transfer using eDMA.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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*/
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void FLEXIO_I2S_TransferAbortSendEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle)
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{
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assert(handle != NULL);
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/* Disable dma */
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EDMA_AbortTransfer(handle->dmaHandle);
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/* Disable DMA enable bit */
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FLEXIO_I2S_TxEnableDMA(base, false);
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/* Set the handle state */
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handle->state = (uint32_t)kFLEXIO_I2S_Idle;
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}
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/*!
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* brief Aborts a FlexIO I2S receive using eDMA.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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*/
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void FLEXIO_I2S_TransferAbortReceiveEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle)
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{
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assert(handle != NULL);
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/* Disable dma */
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EDMA_AbortTransfer(handle->dmaHandle);
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/* Disable DMA enable bit */
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FLEXIO_I2S_RxEnableDMA(base, false);
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/* Set the handle state */
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handle->state = (uint32_t)kFLEXIO_I2S_Idle;
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}
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/*!
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* brief Gets the remaining bytes to be sent.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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* param count Bytes sent.
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* retval kStatus_Success Succeed get the transfer count.
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* retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress.
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*/
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status_t FLEXIO_I2S_TransferGetSendCountEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle, size_t *count)
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{
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assert(handle != NULL);
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status_t status = kStatus_Success;
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if (handle->state != (uint32_t)kFLEXIO_I2S_Busy)
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{
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status = kStatus_NoTransferInProgress;
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}
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else
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{
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*count = handle->transferSize[handle->queueDriver] -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel);
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}
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return status;
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}
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/*!
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* brief Get the remaining bytes to be received.
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*
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* param base FlexIO I2S peripheral base address.
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* param handle FlexIO I2S DMA handle pointer.
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* param count Bytes received.
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* retval kStatus_Success Succeed get the transfer count.
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* retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress.
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*/
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status_t FLEXIO_I2S_TransferGetReceiveCountEDMA(FLEXIO_I2S_Type *base, flexio_i2s_edma_handle_t *handle, size_t *count)
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{
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assert(handle != NULL);
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status_t status = kStatus_Success;
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if (handle->state != (uint32_t)kFLEXIO_I2S_Busy)
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{
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status = kStatus_NoTransferInProgress;
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}
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else
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{
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*count = handle->transferSize[handle->queueDriver] -
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(uint32_t)handle->nbytes *
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EDMA_GetRemainingMajorLoopCount(handle->dmaHandle->base, handle->dmaHandle->channel);
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}
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return status;
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}
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